{
	"data": {
		"target": "teacher-teacher_id",
		"data_type": "count",
		"type": "normal"
	},
	"time_unit": "3",
	"multi_unit": "",
	"filter": [{
		"item": "teacher-city_id",
		"type": "=",
		"value": '2'
	}, {
		"item": "teacher-day",
		"type": ">=",
		"value": "2014-10-10",
		"char": "timestart"
	}, {
		"item": "teacher-day",
		"type": "<=",
		"value": "2014-10-15",
		"char": "timeend"
	}]
}